Block Design File (.bdf)

A schematic design file (with the extension .bdf) created with the Quartus^® II Block Editor. BDFs may contain block diagrams, symbols, and schematics that represent logic in a design. You can read and edit BDFs in the Block Editor.

BDFs saved in Quartus II software version 2.0 cannot be opened in Quartus II software version 1.1 and earlier.